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Merge pull request #2262 from hafriedlander/fix/flush_24

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FIX Nice errors and allows flush on module removal
This commit is contained in:
Sam Minnée 2013-07-23 16:44:36 -07:00
commit a787dddeab
1 changed files with 13 additions and 26 deletions
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39
core/startup/ErrorControlChain.php
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@ -3,16 +3,13 @@
/**
* Class ErrorControlChain
*
* Runs a set of steps, optionally suppressing (but recording) any errors (even fatal ones) that occur in each step.
* If an error does occur, subsequent steps are normally skipped, but can optionally be run anyway
*
* Normal errors are suppressed even past the end of the chain. Fatal errors are only suppressed until the end
* of the chain - the request will then die silently.
* Runs a set of steps, optionally suppressing uncaught errors or exceptions which would otherwise be fatal that
* occur in each step. If an error does occur, subsequent steps are normally skipped, but can optionally be run anyway.
*
* Usage:
*
* $chain = new ErrorControlChain();
* $chain->then($callback1)->then($callback2)->then(true, $callback3)->execute();
* $chain->then($callback1)->then($callback2)->thenIfErrored($callback3)->execute();
*
* WARNING: This class is experimental and designed specifically for use pre-startup in main.php
* It will likely be heavily refactored before the release of 3.2
@ -28,6 +25,9 @@ class ErrorControlChain {
/** We can't unregister_shutdown_function, so this acts as a flag to enable handling */
protected $handleFatalErrors = false;
/** We overload display_errors to hide errors during execution, so we need to remember the original to restore to */
protected $originalDisplayErrors = null;
public function hasErrored() {
return $this->error;
}
@ -38,6 +38,7 @@ class ErrorControlChain {
public function setSuppression($suppression) {
$this->suppression = (bool)$suppression;
if ($this->handleFatalErrors) ini_set('display_errors', !$suppression);
}
/**
@ -68,24 +69,14 @@ class ErrorControlChain {
return $this->then($callback, null);
}
public function handleError($errno, $errstr) {
if ((error_reporting() & self::$fatal_errors & $errno) != 0 && $this->suppression) {
throw new Exception('Generic Error');
}
else {
return false;
}
}
protected function lastErrorWasFatal() {
$error = error_get_last();
return $error && $error['type'] == 1;
return $error && ($error['type'] & self::$fatal_errors) != 0;
}
public function handleFatalError() {
if ($this->handleFatalErrors && $this->suppression) {
if ($this->lastErrorWasFatal()) {
ob_clean();
$this->error = true;
$this->step();
}
@ -93,10 +84,12 @@ class ErrorControlChain {
}
public function execute() {
set_error_handler(array($this, 'handleError'));
register_shutdown_function(array($this, 'handleFatalError'));
$this->handleFatalErrors = true;
$this->originalDisplayErrors = ini_get('display_errors');
ini_set('display_errors', !$this->suppression);
$this->step();
}
@ -105,13 +98,7 @@ class ErrorControlChain {
$step = array_shift($this->steps);
if ($step['onErrorState'] === null || $step['onErrorState'] === $this->error) {
try {
call_user_func($step['callback'], $this);
}
catch (Exception $e) {
if ($this->suppression) $this->error = true;
else throw $e;
}
call_user_func($step['callback'], $this);
}
$this->step();
@ -119,7 +106,7 @@ class ErrorControlChain {
else {
// Now clean up
$this->handleFatalErrors = false;
restore_error_handler();
ini_set('display_errors', $this->originalDisplayErrors);
}
}
}